Combined type-writing and computing machine.



APPLICATION FILED JULYIO, 19H.

Patented Aug. 26, 1913.

WITNESSES: W;

UNITED STATES IiATENT OFFICE.

BUR-NHAM C. STIQKNEY, OF ELIZABETH, NEW JERSEY, ASSIGNOR TO JOHN T.

UNDERWOOD, OI BROOKLYN, NEW YORK.

COMBINED TYPE-WRITIN G AND COMPU'iING MACHINE.

Application filed July m, 1911. Serial No. 637,633.

Serial No. 574,813, filed August 1, 1910/ In said application is illustrated an adding mechanism comprising two primary elements, one being a master wheel and the other being a setof computing wheels, and

- one of said primary elements is connected to the letter-feeding carriage of the typewriting machine to travelfftherewit h step-' lay-step, so that the master wheel shall be properly presented to the computing \vl'ieels in succession. In said application, such connection betweenthe typewriter carriage and the primary elements of tl'ieconiputing mechanism is etl'eeted intermittently; a-liook being-connected to said primai y elements, 7 and certain lugs being provlded "upon the typewriter carriage to engaged'and dis engaged in succession by said book, so tl'iat during the writing --of-'.-a "single: line the various; numbers which are written in different ,c'olumns may be accumulated on the computing mechanism, thus efiec'ting what is known as cross adding. rThe lugs are shown in said application as adjustable to difi'erent points along said carriage.

One of the objects of my invention is to avoid the necessity of readjusting the lugs 40 from time to time as different classes of work are being produced, as in resetting'the lugs the operator is liable to make errors, thus leading to confusion and loss of time.

According to my improvements, :1 special.

bar is demountably secured "upon the typeawriter carriage, and has fixed thereon a set of lugs which have unchangeable positions, or in other words are notadjustable. \Vhen the operator has a certain class of work to do, he needs only toattach said bar to the paper carriage, and then the cross compntation may he proceeded with, without at tending to any adjustment, thus saving time and labor and avoiding mistakes. The bar is provided with a tooth or dowel '-to engage oneof the teeth on the rack bar which ordinarily carries the column stops, so that the bar is accurately positioned, and the lugs.

thereon are sure to perform their proper functions without liability of error. p The invention is useful'whether one or several columns on a worksheet are: to be computed, since the typewriting ln'l-achine may beused for ordinary purposes jYlllflOllt computmgg, and at any time the operator, if

Specification of Letters Patent. Patented Auw, 26; 1 913.

he desires to perform a computation, may

insert the novel bar in the machine, and

thereafter the computing mechanism will operate "at the proper point,so that it is. unnecessary for the operator to adjust a lug, or either to remember or to ascertainwhere said lug is to be placed. In this way the operatorcan fill in similar blankstfrom time 1 to time, and perform computation in the."

proper column or columns thereon,- while at any time he may use the machine for typewrit ng without computing, by'fsimply. .removing the novel bar from the machine;

The invention is also useful in connection with other styles of computing mechanism than that shown in 'said application, as. for

instance where it is ,add vert-ically and not to cross add,

The drawing is a perspective. v of the invention applied to-the r Underwood combined 'typewriting and computing ma;

chine, as set forth in said application. :As set forth in said a icat ion, ap

is mounted on a typewnter carriage 6, and

the latter has a rack 21. to carry any, of a series of tabulating stops 18,-which coiipcrate with key-set denomination stops .17 in A hook S'Sis connected the usual manner. to the master wheel, whereby said master wheel is intermittently connected to'the carriage 6 to travel therewith. The book is automatically disconnected from the'carriage by a trip 70 which a cam 69 on' the hook to pull the same down and'oul;

of connection with the carriage; a spring tending to lift said book.

In placeof the adjustable lugs shown in said application for engagement by said hook, I show a series of fixed lugs 80 which are formed .by cutting, and bending down a portion of a sheet metal bar 81 which extends along the rack 21 forwardly thereof, and high enough to escape the column stops 18, so that the latter may be adjusted wherever desired along the rack 21, usually in alinement with the lugs 80." This bar is (lemountably. secured upon the carriage by riage (3, and extendingrearwardly therefrom, and carrying at their rear ends said column stop rack 21, said thumb screws 82 passing through slots in said ears 83, so that the bar may be adjusted a trifle endwise until a tooth or dowel 85 thereon is fitted into one of the notches in the column stop bar 21, whereby the lugs 80 are brought me chanically into the exact position required for cooperation with said book 55. Thus, by merely inserting said bar in the machine, the same is set for the desired operation of the computing mechanism, .without the necessity of remembering where to set a lot of lugs, and without the risk ofsettin them in the .wrong place, .orthe'necessity o making tests to see ifthey have been rightly placed. Said rack bar 21, during the construction of the typewriting machine, is ad-- justed endwise to a minute extent by means of a thumb nut 60 which is threaded upon a stud 86 which projects from the endof the rack 21; said thumb nutco'mprising a button which works in a notch 87 in one of the arms 84, so that by turning the nut, said-rack 21 may be adjusted as required.

. A set nut 88 is then employed to securethc rack. It will be seenithat this adjustment answers also for the lug bar 81, since the latter is connected by the tooth S5 always to the same notch in the bar 21. I Said hook is connected to and disconnected from the lugs 80in successionjn the manner which will beunderstoodby plication.

Variations may" beresorted towithin the scope of the invention, and portions of the improvementsmaybe used .without others.

Having thus described my invention, I claim: 7

'1. In a combined typewriting and computing machine, the combination with a typewriter carriage, a rack on said carriage, mechanism co6perating with said rack to determine the position of said carriage, and

reference to said apa bar having a plurality of projecting mem: bers thereon for determining the p%ition of a traveling element of the compaut ng brbepart of the machine; said rack and rack also-adjusts said bar relatively to the carriage.

2. In a combined typewriting and-computing machine, the combination 'with'a typewriter carriage, a rack on said-carriage, ,Hlechanismcoiiperating with said rack to (determine the position of said carriage, a

bar having a plurality of projecting members thereon for determining the position of a traveling element of the computing part of the machine, and a'tooth on said bar engaging between the teeth of said rack to mg connected so that adjustment of said determine the relativeposition of said rack and said bar. i

3. In a combined typewriting and compnting machine, the combination with a typewriter carriage, a rack on said carriage,

mechanism coii'perating with said rack to typewriter carriage, a rack on said carriage, mechanism cooperating with said rack to" determine the position of said carriage, a,

bar having a plurality of projecting members thereon for determining the position of a traveling element of the computing part of the machine, a tooth on saidbar engaging between the teeth of said'rack to" determine the relative position of said rack.

and said bar, and means for effecting fine adjustments of said bar and saidlat'k for a distance less than aletterspace movementof the travel of the carriage. I

BURNHAM C. S'lIOKNEY. \Vitnesses:

RAUL ZIRON, K. Fnimiu oa'r.

Copies of this patent may be ofitained (er five cents each, by addressing the Commissioner 'o(' Qatents, Washington, D. C. 

